1991-2020 Degrees Fahrenheit 1 43.6 43.8 -0.2 52 50 1983 2021 2000 2001 normal 2 46.9 48.3 -1.4 41 60 2000 2021 2000 2001 normal 1957 3 51.0 53.7 -2.7 15 86 1976 2021 2000 2001 bottom-third 1930,1959,1997 4 57.4 59.3 -1.9 18 83 1976 2021 2000 2001 bottom-third 1959 5 62.8 64.2 -1.4 22 79 1976 2021 1997 2001 bottom-third 1928,1942,1945,1959,1986 6 65.9 67.7 -1.8 13 88 1976 1954 1992 2001 bottom-third 1925,1959,1991 7 67.7 69.5 -1.8 11 90 1976 2011 1997 2001 bottom-third 1945,1975,1997 8 67.9 69.8 -1.9 11 90 1976 2011 1997 2001 bottom-third 1983 9 67.5 69.0 -1.5 19 82 1976 2011 1997 2001 bottom-third 1928 10 65.8 67.6 -1.8 15 86 1976 2011 1997 2001 bottom-third 1968,1995 11 63.8 65.6 -1.8 11 89 1989 2011 1997 2001 bottom-third 1932,1958,1969,1982 12 62.3 63.7 -1.4 30 70 1979 2011 1997 2001 bottom-third 1987 18 64.6 65.0 -0.4 61 38 1973 2012 1997 2001 normal 1925,1927,1944,2019 24 63.1 63.7 -0.6 57 42 1979 2012 1997 2001 normal 1946,1965 36 63.6 63.7 -0.1 72 26 1970 2012 1998 2001 top-third 48 63.9 63.7 0.2 79 18 1979 2012,2013 1999 2001 top-third 2007,2009,2022 60 64.1 63.6 0.5 86 10 1979 2012 2001 2001 top-tenth 1955,1957,2001